Apparatus for manufacturing rings, especially track-rings for ball and roller bearings



P. S. RYDBECK.

APPARATUS FOR MANUFACTURING RINGS, ESPECIALLY TRACK RINGS FOR BALL ANDROLLER BEARINGS.

APPLICATION FILED OCT 23, I919.

Patented Apr. 27, 1920.

2 SHEETS--SHEET P. S. RYDBECK.

APPARATUS FOR MANUFACTURING RINGS, ESPECIALLY TRACK RINGS FOR BALL ANDROLLER BEARINGS.

APPLICATION FILED ocr 23. I919.

1,338,462. Patented Apr. 27, 1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

PATRIK SAMUEL RYDBEGK, OF GOTTENBORG, SWEDEN.

APPARATUS FOR MANUFACTURING RINGS, ESPECIALLY TRACK-RINGS FOR BALL ANDROLLER BEARINGS.

Patented Apr. 27, 1920.

Original application filed July 9, 1918, Serial No. 244,060. Divided andthis application filed October 23,

. 1919. Serial No. 332,794.

To all whom it may concern Be it known that I, PATRIK SAMUEL RYD- BECK,a sub'ect of the King of Sweden, residing at ottenborg, in the Kingdomof Sweden, have invented new and useful Apparatus for ManufacturingRings, Especially Track-Rings for Ball and Roller Bear ings, of-whichthe following is a specification.

This invention, bein a division of my pendin application, Serial Nof244,060, filed Ju y 9, 1918, relates to means for manufacturing rings,especially the inner track rings for ball and roller bearings.

he primary object of the invention is to provide an improved pressingapparatus by means of which such rings may be manufactured with exactdimensions simpler and cheaper than heretofore.

The invention consists, chiefly, in the combination with a pressingapparatus, of a die composed of a number of separate jaws movable inrelation to each other and, when joined having inside the shape of theouter side of the ready pressed ring, a counter die adapted to supportone end of a tubular blank, an upsetting ring movable longitudinally inrelation to the die and adapted to press against the other end of theblank, and a mandrel movable longitudinally in the upsettin ring andhaving the shape of the inner si e of the ready pressed ring.

An embodiment of my invention is illustrated in the accompanyingdrawings in which Figure 1 is a vertical section of an upsetting deviceconstructed according to this in vention. Fig. 2 is a view correspondingto Fig. 1 and showing the pressing tools in a middle position. Fig. 3 isa cross-section on line AB in Fig. 2. Fig. 4 is a sectional view, on agreater scale, of the pressing tools.

Referring to the drawings, which show a device adapted for pressing theinner trackrings of ball-bearings, 29 is a die composed of threeseparate jaws movable radially in relation to each other and formingwhen joined, an inner cylindrical surface having two annular recessessituated at each side of an annular rib of curved cross-section, saidrecesses and rib cor sponding to the two sh nlders and the ball-trackrespectively oi ihe finished track-ring 30, as will appear from Fig. 4.The jaws 29 having a conical outer surface are movable in a conicalrecess formed in a die 31, and each of them is guided by a wedge 32.They rest on an annular plate 33 movable in the die 31 and supported byfour uprights 34 (one only of which is shown) secured to a plate 35.Said plate 35 bears against spiral springs 36 supported by threescrew-bolts 37 two only of which are shown) screwed in t e die-holder38. Said die-holder is by means of screws 39 rigidly secured to thesupport 23. Attached to the plate 35 are four screw-bolts 40 passingthrough holes in the die-holder 38 and the die 31 and at the top rigidlyconnected with a ring 41 bearing against the upper end of the jaws 29.Consequently, at the downward movement of the plate 35 also the jaws 29are moved downward and at the same time toward each other, owing to theconical seat in the die 31. The downward movement of the plate 35 isefl'ected by means of an upright 42 secured to the same and extendingthrough a central hole in the die-holder 38 and the counter-die 43 whichin this case is rigidl connected with said die-holder, the uprig t 42being actuated by the mandrel 2 placed in the holder 9. As shown in Fig1, the top of the upright 42 extends normally above the counter-die 43which is provided at the upper part with a cylindrical recess havingthesame diameter as the mandrel 2. The die 31 is movable in thedie-holder 38 and bears normally, owing to the action of springs 44,against the lower edge of a ring 45 attached b means of screws 46 to thedieholder 3. he downward movement of the die 31 which is counteracted bythe springs 44 is limited by the annular bottom surface 47 of thedie-holder 38.

The upsetting ring 1 is, by means of screws 7, fastened to a socket Smovable in the longitudinal direction in a holder 9 connected with themovable members of the pressing machine. At the lower end the socket His provided with an annuiar flange 10 onto which is screwed an outersocket 11 provided at the top with an inwardly directed flange 12. Inthe position shown in Fig. 1 the flange 12 bears against a flange 13disposed at the lower end of the holder 9 thus preventing the socket 8and the upsetting ring 1 from falling down. The upward movement of thesocket 8 is limited b the bottom 14 of the holder 9. Placed insi e thesocket 8 and movable longitudinal] in re lation to the same is themandre 2, the

turned ofl portion 15 of which is guided in a central hole in-the holder9. Placed between the mandrel 2 and the bottom 14 of the holder 9 in astrongspring 19 counteractin the upward movement of the mandrel 2 andthe travel of which is equal to or greater than the upsetting of thering 30.

The mandrel 2, which fits snugly in the upsetting ring 1, has a diametercorresponding to the inner diameter of the finished ring 30, and theouter diameter of the lower portion of the upsetting ring 1 is equal tothe outer diameter of the rin 30.

Further a stripper 27 is disposed consisting of an annular memberinclosing the holder 9 and provided with two radial arms rigidly securedby means of screw-bolts 28' to the support 23.

The operation of the device is as follows. The tubular blank 30 isplaced on the stationary counter-die 43, which is possible withoutdifficulty, because the jaws 29 are moved ,apart, as will appear fromFig. 1. Then the holder 9 together with the upsetting ring 1 and themandrel 2 is moved 80 downward. Owing thereto, the lower surface 48 ofthe upsetting ring 1 comes in contact with the jaws 29, and since thepressure exerted at that moment by the upsetting ring corresponds onlyto the weights 35 of the sockets 8 and 11 the upsetting ring is stoppeda moment in this position, while the holder 9 and the mandrel 2 continueto move downward. The mandrel 2 is moved into the blank 30 at the sametime movin 40 the upright 42 and the plate downwar against the action ofthe springs 36, the total tension of which is less than that of thespring 19. By the aid of the bolts and the ring 41 the jaws 29 are alsomoved 5 downward and toward each other, so that,

when the mandrel 2 has been brought in contact with the stationarycounter-die 43, the jaws are completely moved together and press theblank 30 against the mandrel 2. 5 At the same time the ring 41 comes incontact with the upper surface of the die 31, as shown in Fig. 2.Meanwhile the upsetting ring 1 has followed the jaws 29 in theirdownward movement, untl it comes in contact with the upper edge of theblank 30 and then is stopped a moment. Owing to the dies in this momentbeing not completely moved downward, an interspace exists between thesurface 48 of the upsetting ring and the jaws 29 corresponding to abouthalf the total upsetting of the finished ring. In this moment the socket8 is brou ht in contact with the bottom 14 of the holiler 9, and theupsetting of the blank commences 66 (Fig. 2). Because the upsettingmovement takes place at the upsetting ring 1, while the counter-die isstationary, the upper shoulder of the track-rin will be upset in thefirst line, 'while the ower shoulder will be upset only in part. WVhenthis phase of the 70 upsetting operation is ended, the lower surface 48of the upsetting ring is again brought in contact with the jaws 29 andon account thereof the movement of the upsetting ring ceases in relationto the jaws and 7-5 the ring 30. The holder 9 and the upsetting ring 1continue, however, to move downward, which results in that the jaws 29together with the die 31 are pressed downward against the action of thesprings 44, 8') until the die 31 comes in contact with the annularbottom surface 47 of the die-holder 38. Said movement of the jaws 29 andthe die 31 will cause the counter-die 43 to be,

so to say, moved upward against the lower edge of the ring 30 or, inother words, the upsetting operation is now effected by the counter-die4, and, therefore, also the lower shoulder of the track-ring will becompletely upset, the ring thus obtaining the cross-sectionform shown inFig. 4. a

The upsetting of the ring 30 is now completed, and the holder togetherwith the upsetting ring 1 commences to move upward. Owin thereto, thepressure on the jaws 29 and t e upright 42 ceases, and the die 31 withthe jaws 29 is moved upward by the springs 44. At the same time thejaws, by the aid of the late 35, and the uprights 34 together with t eplate 33, by the aid of the springs 36, are moved upward in relation tothe die 31 to the separated position shown in Fig. 1. The finished ring30 still adheres to the mandrel 2. At the continued upward motion of theholder 9 the socket 11 strikes the stripper 27, and on account thereofthe socket 8 and the up-setting ring 1 are moved downward to theposition shown in Fig. 1; the ring 30 thus being stripped off from themandrel 2 may be removed in any suitable manner.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. Apparatus for producing rings, as for instancetrack-rings for ball and roller bearings, comprising a die composed of anumber of separate jaws movable in relation to each other and, whenjoined, having inside 120 the shape of the outer side of the readypressed ring a counter-die ada ed to support one end of a tubular blank,an upsetting ring movable lon itudinally in relation to the die andadapte to iress against the 125 other end of the blank, an a mandrelmovable longitudinally in the upsetting ring and having the shape of theinner side of the ready pressed ring.

2. Apparatus for producing rings, as for 130 instance track-rings forball and roller bearings, comprising a die composed of a number ofseparate jaws movable in relation to each other and, when joined, havinginside the shape of the outer side of the ready pressedring and outsideconical form, a die iaving a seat correspondin to said conical form, acounter-die adapte to support one end of a tubular blank, an upsettingring movable longitudinally in relation to the said jaws and adapted to.press against the other end of the blank, and a mandrel movablelongitudinally in the upsetting ring and having the shape of the innerside of the ready pressed ring.

3. Apparatus for producing rings, as for instance track-rings for balland roller bearings, comprising a die composed of a number of separatejaws movable in relation to each other and, when joined, having insidethe shape of the outer side of the ready pressed ring and outsideconical form, a die having a seat corresponding to said conical form, acounter-die adapted to support one end of a tubular blank, an upsettingring movable longitudinall in relation to the said jaws and adapte topress against the other end of she blank, a yielding support for thesaid jaws, means connectin said support with said jaws, and a mandremovable longitudinally in the upsetting ring and having the shape of theinner side of the ready pressedv ring.

4. Apparatus for producing rings, as for instance track-rings for balland roller bearings, comprising a die composed of a number of separatejaws movable in relation to each other and, when joined, having insidethe shape of the outer side of the ready pressed ring and outsideconical form, a die having a seat correspondin to said conical form, acounter-die adap'te to support one end of a tubular blank, an upsettingring movable longitudinally in relation to the said jaws and adapted topress against the other end of the blank, a yielding support for saidjaws, a die-holder supporting the seat forming die, a counter-dierigidly connected with said die-holder, and a mandrel movablelongitudinally in the upsetting ring and having the shape of the innerside of the ready pressed ring.

In testimony whereof I have signed my name.

PATRIK SAMUEL RYDBECK.

Correction in Letters PatentNO. 1,338,462-

[ It-it hereby certified thet Letters Patent No. 1,338,462, grantedApril 27, 1920,

' npon the application of Patrik Samuel Rydbeck, of Gottenborg, Sweden,for an improvement in "Apparatus for Manufacturing Rings, EspeciallyTrack-Rings for Ball and Roller Bearings, were erroneously issued to theinventor, said Rydbeck,

whereas said Letters Patent should have been issued to AkieboldgetSveneka Kauayetfabrilcen, of Goteborg, Sweden, (1 corpora/time] Sweden,as as of the entire interest in said invention, as shown by the recordsof assignments in this ofiice; and that-tile said Letters Patent shouldbe read with this correction therein thtt the tea-me may conform to therecord of the case in the Patent Oifice.

Signed and sealed this 25th day of May, A. D., 1920.

[snub] M. H. COULSTON, Ading (lommiuiener of Patente. 01. 78-18.

